| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact imaging lens which meets a requirement for a low profile, has brightness with an F-number of 2.5 or less, achieves a wide angle of view, and satisfactorily corrects various aberrations, at low cost. ! SOLUTION: The imaging lens comprises, in order from the object side: a first optical element group LG1 with a positive refractive power comprising a first lens L1 with a positive refractive power whose convex surface is directed toward the object side, a second lens L2 with a negative refractive power whose concave surface is directed toward the image side, and a third lens L3 with a positive refractive power whose convex surface is directed toward the object side; a second optical element group LG2 with a positive refractive power comprising a fourth lens L4 with a positive refractive power whose convex surface is directed toward the image side; and a third optical element group LG3 with a negative refractive power comprising a fifth lens L5 with a negative refract |
